There are rods that extend pretty wide and I also believe I saw some extenders for rods at either Lowes or JC Penny when we were putting up drapes in our bedroom. You might want to call around to see if they have them. Bed Bath & Beyond is another store that comes to mind who may carry them.

I bought mine at Restoration Hardware. I probably could have found it cheaper somewhere else.

Thanks for the responses.

forhgtv - were you able to get one that long at RH? All that I saw went to about 12 ft or less? Can you buy 2, and extra brackets and make it longer that way?

Your best bet for low cost yet great looking rods are to use closet dowel rods you can buy at places like HoDe and L's. Usually a dollar or so a linear foot. Though I'm not sure they are a full 1.5 inches in diameter you can get them in very long lengths. L's carries unfinished brackets, finials and other hardware you might need to put to two rods together if they don't happen to have the full length you need.

I just measured and I must apologize. You were right; mine is only 12 feet long. However, in a quick search of the Internet, I found 160" and longer at blindschalet.com and at overstock.com.

This might be one of the threads you are thinking of. Within this thread there is a reference to another one as well:

http://ths.gardenweb.com/forums/load/decor/msg072219155625.html?10

I also have a large window that I recently struggled with. You will see in the thread I tried the Opus Rod from Country Curtains (adjustable to 144") and also a curtain rod from Lowes. (Not a closet dowel but a true drapery rod with coordinating brackets, rings and finials.) The nice thing with the wooden rods is that you can get exactly the length you want just by cutting them down. The Lowes rod can be purchased in 4, 6 or 8 foot lengths that you can put together with a connector screw they sell with the rods. I have a bracket in the center so it completely covers the seam. It was important for me also find a large diameter rod and the Lowes rod was 1 3/4 inches.

You may be referring to the thread I started awhile back when I was looking for an 11 foot drapery rod. I just looked for it myself by searching my name and it didn't come up, but I looked thru all the older pages and found it on page 12! I'll link it at the end of this post.

I have two thoughts regarding the width of your drapery rod. If you really want to use a rod that wide, I would suggest going the route dana g did and use the wood rods that you can join. Since you have 3 windows I would use a support at each end, as well as at the two points where the center window meets the window to either side, for a total of 4 supports. That way you could join together 3 sections of rods, hiding the 'seam' at each of the 2 supports in the 'middle' of the expanse. My other thought is because of the very large expanse you're working with, it may look fine to use 2 shorter rods at each end of the window. Good luck with your project.

Here is a link that might be useful: Where will I find a drapery rod that's 11 feet wide?

For 14 feet, I'd look at iron pipe.

I put two 8-foot wooden rods together (they sell the screws that are threaded on both ends for this)...I have an approximately 14' window myself. I put a center support bracket which hides the seam.

I have used the Allen & Roth wooden poles from Lowes for my triple windows. I think the largest they come in is 8'. I connected 2, used a support piece from the middle that matches the pole and finial and it works great with 4 very heavy 96" lined drapes. I am 2 more triple windows to do in my house and I am planning on using the same set-up with different finials bc it worked so well and was a great price.

I do like the conduit idea, wish I would have come across that before I did all of the smaller windows in my house!